AD704TQ/883B - Quad Picoampere Input Op Amp | Analog Devices
부품 번호: AD704TQ/883B ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $25.5 | $25.50 |
| 10 | $23.2 | $232.00 |
| 100 | $20.1 | $2,010.00 |
| 500 | $18 | $9,000.00 |
| 1,000 | $16.5 | $16,500.00 |
AD704TQ/883B 개요
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in analog signal conditioning, filtering, and mathematical operations. The AD704TQ/883B is a quad op amp, meaning it contains four independent amplifiers in one package, saving board space and cost. It belongs to the family of precision bipolar op amps, which are distinguished by their low offset voltage, low drift, and low noise, making them suitable for instrumentation and measurement systems.
Key features of the AD704TQ/883B include high DC precision with 75 µV maximum offset voltage, 0.5 µV/°C maximum offset voltage drift, and 150 pA maximum input bias current. It also offers low noise of 0.5 µV p-p typical at 10 Hz and low power consumption with a maximum supply current of 600 µA per amplifier. The device is specified for operation over the military temperature range of -55°C to +125°C, and its MIL-STD-883B qualification ensures reliability in harsh environments.
The AD704TQ/883B uses superbeta bipolar input transistors to achieve picoampere input bias currents, which are typically associated with BiFET amplifiers but with lower drift. This architecture provides excellent DC accuracy and stability over temperature, making it ideal for precision analog circuits. The quad configuration allows for compact designs in multi-channel systems, reducing component count and improving matching between channels.
Typical applications include precision instrumentation, data acquisition systems, active filters, and military/aerospace electronics where high accuracy and reliability are critical. The low input bias current and low drift make it suitable for high-impedance sensor interfaces, such as photodiode amplifiers and pH probe buffers. The wide supply voltage range and low power consumption also enable battery-powered portable instruments.
When designing with the AD704TQ/883B, consider the input common-mode voltage range and ensure proper decoupling of the power supplies. The device's low input bias current allows the use of high-value feedback resistors, but care must be taken to minimize leakage currents from PCB contamination. For best performance, use guard rings around the input pins and maintain a clean, low-humidity environment.
드롭인 대체품: AD704TQ/883B — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD704TQ/883B (동일 폼 팩터 및 풋프린트) — 차이점: Amplifier Type, Mounting Type, Number of Channels, RoHS Status, Supply Voltage Range.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD704TQ
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD704SE/883B
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD704TQ/883B 최대 정격 & 전기적 특성
| Number of Channels | 4 |
| Supply Voltage Range | ±4.5 V to ±18 V |
| Input Offset Voltage (Max) | 75 µV |
| Input Offset Voltage Drift (Max) | 0.5 µV/°C |
| Input Bias Current (Max) | 150 pA |
| Input Bias Current Drift (Typ) | 0.2 pA/°C |
| Voltage Noise (Typ) | 0.5 µV p-p at 10 Hz |
| Supply Current per Amplifier (Max) | 600 µA |
| 동작 온도 범위 | -55°C to +125°C |
| Package Type | 14-pin CDIP |
| 실장 유형 | Through Hole |
| Qualification | MIL-STD-883B |
| RoHS 상태 | Non-compliant (military grade) |
| Lead Free | No |
| Amplifier Type | General Purpose |
AD704TQ/883B 핀 구성
| 핀 1 | OUT A — Output of amplifier A |
| 핀 2 | -IN A — Inverting input of amplifier A |
| 핀 3 | +IN A — Non-inverting input of amplifier A |
| 핀 4 | V+ — Positive power supply |
| 핀 5 | +IN B — Non-inverting input of amplifier B |
| 핀 6 | -IN B — Inverting input of amplifier B |
| 핀 7 | OUT B — Output of amplifier B |
| 핀 8 | OUT C — Output of amplifier C |
| 핀 9 | -IN C — Inverting input of amplifier C |
| 핀 10 | +IN C — Non-inverting input of amplifier C |
| 핀 11 | V- — Negative power supply |
| 핀 12 | +IN D — Non-inverting input of amplifier D |
| 핀 13 | -IN D — Inverting input of amplifier D |
| 핀 14 | OUT D — Output of amplifier D |
일반적인 애플리케이션
AD704TQ/883B 적합 용도: 6 애플리케이션s: Precision Instrumentation, Data Acquisition Systems, Active Filters, Military and Aerospace Electronics, Sensor Signal Conditioning, Test and Measurement Equipment.
Precision Instrumentation
The AD704TQ/883B's high DC precision, with 75 µV max offset voltage and 0.5 µV/°C drift, makes it ideal for precision instrumentation amplifiers and signal conditioning circuits. Its low input bias current of 150 pA minimizes errors when interfacing with high-impedance sensors, ensuring accurate measurement in laboratory and field instruments. The quad configuration allows multiple channels to be processed in a single package, reducing board space and improving channel-to-channel matching. For best performance, use precision resistors and guard rings around input pins to minimize leakage currents.
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Data Acquisition Systems
In data acquisition systems, the AD704TQ/883B provides accurate signal conditioning for analog inputs before ADC conversion. Its low offset voltage and drift ensure minimal DC errors, while the low input bias current reduces loading on high-impedance sources. The quad op amp can buffer multiple channels, simplifying PCB layout and reducing component count. The military temperature range and MIL-STD-883B qualification make it suitable for aerospace and defense data acquisition systems. Pair with a high-resolution ADC like the AD7176-2BRUZ for precise measurements.
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Active Filters
The AD704TQ/883B is well-suited for active filter designs, such as low-pass, high-pass, and band-pass filters, due to its low noise and high DC precision. Its low input bias current allows the use of high-value resistors without significant offset errors, enabling accurate filter cutoff frequencies. The quad configuration enables multi-stage filters in a single package, saving space in compact designs. The wide supply voltage range supports various filter topologies, and the military temperature range ensures stable performance in extreme environments.
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Military and Aerospace Electronics
The AD704TQ/883B is qualified to MIL-STD-883B and operates over the full military temperature range of -55°C to +125°C, making it ideal for military and aerospace applications. Its high reliability and precision ensure accurate signal processing in avionics, radar, and communication systems. The ceramic DIP package provides robust mechanical and thermal performance. The low power consumption of 600 µA per amplifier is beneficial for power-constrained defense systems. Use in conjunction with other MIL-STD-883B qualified components for system-level compliance.
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Sensor Signal Conditioning
The AD704TQ/883B's low input bias current of 150 pA makes it ideal for conditioning signals from high-impedance sensors such as photodiodes, pH probes, and piezoelectric sensors. Its low offset voltage and drift ensure accurate amplification of small sensor signals. The quad configuration allows multiple sensors to be interfaced in a single package, reducing component count. The wide supply voltage range accommodates various sensor biasing requirements. For photodiode applications, use a transimpedance amplifier configuration with a high-value feedback resistor.
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Test and Measurement Equipment
In test and measurement equipment, the AD704TQ/883B provides precise signal conditioning for accurate measurements. Its high DC precision and low noise ensure reliable readings in multimeters, oscilloscopes, and signal analyzers. The quad op amp can be used for multiple measurement channels, improving efficiency and reducing cost. The military temperature range and MIL-STD-883B qualification make it suitable for rugged test equipment used in field and military environments. The low power consumption is beneficial for portable instruments.
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추천 제품 요약
엔지니어링 참조 데이터: AD704TQ/883B — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD704TQ | AD704SE/883B | AD704KN | AD704JN | OP470GP |
|---|---|---|---|---|---|---|
| Package | 14-pin CDIP | 14-pin CDIP | 14-pin CDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Supply Voltage Range | ±4.5V to ±18V | ±4.5V to ±18V | ±4.5V to ±18V | ±4.5V to ±18V | ±4.5V to ±18V | ±4.5V to ±18V |
| Input Offset Voltage (Max) | 75 µV | 75 µV | 75 µV | 150 µV | 150 µV | 400 µV |
| Input Bias Current (Max) | 150 pA | 150 pA | 150 pA | 150 pA | 150 pA | 25 nA |
| Operating Temperature Range | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C |
| MIL-STD-883B Qualified | Yes | No | Yes | No | No | No |
주요 차별점
- Military-grade qualification (vs AD704TQ)
- Wider temperature range (vs AD704KN)
- Lower input bias current (vs OP470GP)
설계 노트
For optimal performance, place decoupling capacitors (0.1 µF ceramic) close to the V+ and V- pins. Use a ground plane to minimize noise and ensure stable operation. For high-impedance inputs, guard rings around the input pins can reduce leakage currents and maintain the low input bias current specification.
The AD704TQ/883B is specified for operation up to +125°C. In high-temperature environments, ensure adequate airflow or heatsinking to keep the junction temperature within limits. The ceramic DIP package has good thermal conductivity, but power dissipation should be considered in high-supply-voltage applications.
Avoid exceeding the absolute maximum supply voltage of ±18V. Also, ensure the input common-mode voltage does not exceed the supply rails. For precision applications, use low-leakage capacitors and clean PCB to prevent contamination that could increase input bias current.
규정 준수 정보
Military-grade component, not RoHS compliant due to lead-based solder and ceramic package.
